Failed cura firmware update

[MrLazowski 0]

I purchased 2 Ultimaker 2 for a school district tech ed department. I tried to update the firmware on one of the machines. I started an update and it stopped. Received "Firmware update failed due to an unknown error." I contacted Ultimaker support, they wanted me to purchase another power cord for $165. I got the power cord from the same machine from the other school in the district, there was nothing wrong with the cord it powered the other machine. Now support wants me to buy an electronic board. I don’t think that’s the problem either. My machine was working fine before I attempted the update. Now my machine will not respond to anything. It is getting some power because the electronic board still has a green light on and the machine is making some faint noises. Is there a firmware fix for this issue?